he is projecting himself as Bank manager from Head Quarters of ATM section and asking for the debit (ATM) card details and then if not providing the details threatening to block the ATM card and Bank Account.

Caller was asking me to take part in a survey, when asked where they got my number they said they work with various utilities providers. she had my address as well as number. When I asked them to take me off their phone list and that I had no knowledge of having given any permission to pass on my number they hung up.